Apostasy

Apostasy (pronounced /əˈpɒstəsi/; from Greek ἀποστασία (apostasia), a defection or revolt, from ἀπό, apo, "away, apart", στάσις, stasis, "stand", "standing") is the formal disaffiliation from, or abandonment or renunciation of a religion by a person.

Legal opinion on apostasy by a Fatwa committee concerning the case of a man who converted to Christianity: "Since he left the Islam, he will be invited to express his regret. If he does not regret, he will be killed pertaining to rights and obligations of the Islamic law."

Lo! those who disbelieve after their (profession of) belief, and afterward grow violent in disbelief: their repentance will not be accepted. And such are those who are astray.

Still in the garden shadows art Thou pleading,
Staining the night dews with Thine agony;
But one is there Thy woe and prayer unheeding,
And to their guileless prey
Thy murderers leading, Lord, is it I?

The laws of Islam, to which anyone who joins it agrees, forbid someone born a Muslim, or someone who [begins] to believe in Islam [at some point in his life] of his own free will, to rebel against Islam and to move to any other religion...

AbuMusa said: Mu'adh came to me when I was in the Yemen. A man who was Jew embraced Islam and then retreated from Islam. When Mu'adh came, he said: I will not come down from my mount until he is killed. He was then killed. One of them said: He was asked to repent before that.